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INVISTA Seaford Plant
On This Page
EPA ID: DED002348845
Location:
25876 DuPont Road
Seaford, DE 19973-4399
Property Area 750 acres
Congressional District: 1
Other Names:Former Dupont Seaford Plant
Last Updated: July 2011
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Contacts
EPA Contact
Diane Schott
U.S. Environmental Protection Agency - Region III
1650 Arch Street
Mail code: 3LC20
Philadelphia, PA 19103
Phone: (215) 814-3430
Email: schott.diane@epa.gov
Delaware DNREC Project Manager
Douglas Zeiters
Delaware Department of Natural Resources and Environmental Control
89 Kings Highway
Dover, DE 19901
Phone: (302) 739-9403
Email: douglas.zeiters@state.de.us
Bulletin Board
Cleanup Status
- Corrective Action Status: Complete with Controls
- Human Exposure Controlled: YES
- Ground Water Controlled:
YES
Status
- The investigation, remedy selection, and remedy implementation at this Facility are complete, and Institutional Controls have been put into place to prevent exposure to contamination remaining on-site. As the current owner of the real property, DuPont is responsible for on-going monitoring and/or maintenance of the remedy consistent with the Record of Decision.
Background
- The Seaford Facility is located south of Seaford, Delaware on DuPont Road (formally named Woodland Road). The 750 acre plant property is bordered by the Nanticoke River to the east and the Norfolk Southern Railroad to the north. Two branches of the Nanticoke River flow east along the facility's south and southwest property lines.
- The facility was constructed in 1938 by DuPont for the production of textile fibers. It was owned and operated by DuPont until the sale of the operations and assets to INVISTA in 2004. DuPont retained ownership of the real property to conduct the RCRA corrective action activities at the facility.
- INVISTA recently restructured the operations at the Seaford plant. The Seaford plant no longer produces the Bulk Continuous Filament (BCF) nylon and has idled the facilities associated with their Polymerization Operations. As a result of the restructuring efforts, hazardous waste generation is mainly from the facility's process lab and two maintenance shops. Waste is accumulated in the facility's Process Lab Less Than 90-day Accumulation Area and the C2 Warehouse Less Than 90-day Accumulation Area.
- The Seaford plant receives hexamethylenediamine (HMD) by rail. The HMD is used in a remaining production process to manufacture a salt product that is then shipped to other plants.
- Following an investigation and comment period that extended from April 16 to May 15, 2006, DNREC issued a final RCRA corrective action decision for this Facility on May 25, 2006.
- The selected remedy at the Seaford Facility consists of the following items:
- SWMU 1: Sampling of well L-6D and monitored natural attenuation of carbon tetrachloride in conjunction with institutional controls. The institutional control is a groundwater management zone around the limits of the carbon tetrachloride plume. On July 20, 2010, the SHWMB concurred with DuPont's recommendation to discontinue sampling monitoring well L-6D for SWMU 1, as carbon tetrachloride has been reported below its MCL for the past three consecutive monitoring rounds.
- SWMU 7/12/13: Sampling for arsenic in twelve existing wells and three surface water locations, and monitored natural attenuation of arsenic in conjunction with institutional controls. The institutional control is a groundwater management zone around the limits of the arsenic plume.
- SWMU 13/17: Installation of a protective soil cover installed over exposed solid waste; completed October 30, 2006.
- Installation of a protective soil cover over exposed solid waste proximate to SWMU 13/17 was completed October 30, 2006. On July 20, 2010 The SHWMB concurred with DuPont's recommendation to discontinue sampling monitoring well L-6D for SWMU 1, as carbon tetrachloride has been reported below its MCL for the past three consecutive monitoring rounds.
Contaminants and Risks
- Wastes evaluated included fly ash, spent halogenated solvents, discarded commercial chemical products and wastes that exhibited corrosive and/or ignitable properties. Groundwater underlying localized areas of the facility contains low levels of metals and volatile organic compounds and previously exhibited low pH. The primary metal of concern in groundwater and sediment is arsenic. The source of increased concentrations of arsenic in groundwater was identified as coal ash generated by the facility power plant. A coal pile adjacent to the power plant was identified as the source of low groundwater pH. A formerly operating landfill was identified as the source of volatile organic compounds in the groundwater. These releases to groundwater were remediated by the implementation of various interim measures, corrective measures and final remedies.
Institutional Controls
- A Memorandum of Agreement between the DNREC Division of Air and Waste and the DNREC Division of Water Resources was signed and put in place on April 3, 2008. The Agreement restricts water supply wells from being installed within the footprint of two groundwater management zones. One groundwater management zone extends beyond the footprint of an onsite arsenic groundwater contaminant plume. The second groundwater management zone extends beyond the footprint of an onsite carbon tetrachloride groundwater contaminant plume.
- An Environmental Covenant (EC) between DNREC and DuPont was filed with the Sussex County Assessment Division on September 29, 2009. The EC prohibits withdrawal of groundwater from the Groundwater Management Zones (GMZs). In addition, the EC enacts land use restrictions for designated areas and bans any activities which may interfere with the remedy.
- During remedy selection, DNREC issued a public notice for a 30-day public comment period to review and comment on the "Statement of Basis" for the DuPont Seaford facility. The public comment period was in effect from April 16 to May 15, 2006 and afforded the community an opportunity to review the entire facility file and the proposed corrective measures for the site.
Two Institutional Controls were enacted from 2008 – 2009.
More details and a map of the institutional controls can be viewed at the following Interactive Google Map.
Documents and Reports
- Some of the site’s key documents of interest are accessible below:
- Environmental Indicator Determination - Human Exposures [8pp, 25 KB, About PDF]
- Environmental Indicator Determination - Groundwater Migration [14 pp, 249 KB, About PDF]
- Documents and reports regarding this facility also can be reviewed in person at these locations:
Delaware DNREC
Project Manager Douglas Zeiters
89 Kings Highway
Dover, DE 19901
Phone: (302) 739-9403
Email: douglas.zeiters@state.de.us
Call for an appointment.U.S. EPA Region III
Land & Chemicals Division
1650 Arch Street-11th Floor
Philadelphia, PA 19103
(215) 814-3430
Call for an appointment. - Submit a FOIA Request
Get instructions on how to submit a FOIA request. Additional fee for requests over 100 pages.
Photos, Maps and Diagrams
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| INVISTA Seaford Plant | INVISTA Geospatial PDF-Map [PDF, 1.8 MB, 1 page, About PDF] |
Click on a thumbnail to enlarge the photo or GeoSpatial PDF-Map)
Reuse Information
- The facility is under continued use.
Questions
- The EPA is dedicated to providing you with timely and accurate information about our work at this site. If you have any questions or concerns, please contact EPA contact : Ms. Diane Schott (215) 814-3430 or Delaware DNREC Project Manager Douglas Zeiters (302) 739-9403.